Hard-wired digital data preprocessing applied within a modular star and target tracker

Details Hard-wired digital data preprocessing applied within a modular star and target tracker Hard-wired digital data preprocessing applied within a modular star and target tracker

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3163..214s&link_type=abstract

Proc. SPIE Vol. 3163, p. 214-223, Signal and Data Processing of Small Targets 1997, Oliver E. Drummond; Ed.

Computer Science

Scientific paper

Star sensors developed in the last years can be enhanced in terms of mass reduction, lower power consumption, and operational flexibility, by taking advantage of improvements in the detector technology and the electronics components. Jena-Optronik GmbH developed an intelligent modular star and target named 'stellar and extended target intelligent sensor' (SETIS). Emphasis was placed to increase the sensor adaptability to meet specific mission requirements. The intelligent modular star and target tracker shall generate positional information regarding a number of celestial targets or shall act as a navigation camera. The targets will be either stars or extended objects like comets and planetary objects, or both simultaneously. Deign drivers like simultaneous tracking of extended targets and stars or searching for new objects during tracking of already detected objects require a powerful hard-wired digital data preprocessing. An advanced rad-tolerant ASIC- technology is used for the star tracker preprocessor electronics. All of the necessary preprocessing star tracker functions like pixel defect correction, filtering, on-line background estimation, thresholding, object detection and extraction and pixel centroiding are realized in the ASIC design. The technical approach for the intelligent modular star and target tracker is presented in detail. Emphasis is placed on the description of the powerful signal preprocessing capabilities.

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